Detection of Interstellar H_{2}C^{13}O^{16}

Abstract

The 111-110 transition of interstellar H2C13016 has been detected in the direction of the continuum sources Sgr B2 and Sgr A and probably W51. Comparison with H2C'20'6 spectra obtained in these direc- tions indicates the possible presence of regions of high C13 abundance near the galactic center. The rest frequency of the 1~-1~ transition has been determined more accurately than in a previous laboratory measurement